In a regulatory filing late Wednesday, the Fort Worth, Texas-based airline warned its August revenue was weaker than expected and expressed concern it might default on a loan covenant next year. See related story.

Speaking to analysts and investors in New York Thursday, Chief Executive Gerard Arpey outlined initiatives AMR is taking to cut costs and signaled that the airline is guarded about its prospects.

"We're being very cautious about our plans next year," he said. "You will not see us materially grow our mainland operations."

New plans to cut costs call for the airline to reduce its off-peak flights from Miami and Dallas, as well as limit the types of planes being flown from certain hubs, Arpey added. The airline is also considering charging for food on certain flights and renting portable entertainment systems to passengers.

AMR, which averted bankruptcy last year after cutting its annual expenses by $4 billion, has implemented several measures to offset exorbitant fuel prices. Among them include using a single engine to taxi along the runaway and using tugs, not engines, to pull away from gates.

The airline's fuel bill this year will be more than $3.8 billion, about 40 percent higher than last year.

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